Measurement of plasma flow parameters and microparticle velocity in pulsed electrothermal launcher

Summary form only given. The high velocity pulsed plasma flows may be used for powder material microparticles acceleration and obtaining coatings with super quality parameters. In this respect the experimental study of parameters of flows generated in discharge gaps of the electrothermal launcher, has been carried out. The following parameters were to be measured: velocities and extension of various parts of the pulsed flows, i.e., the shock compressed gas region and the high temperature region. Pressure piezosensors, photodiodes, and photomultipliers were used in measurements as well as the shadow photography techniques on the basis of a pulse laser. The flows visualization was carried out. In obtained pictures, in particular, the shock compressed gas region shrinkage due to shock-wave interactions was observed as well as this region backward boundary diffusion due to various instabilities.